Do I need to use fungicide or fertilize my River Birch that has leaf spot? - Cooperative Extension: Garden and Yard - University of Maine Cooperative Extension

Question: Our River Birch has leaf spot that I noticed at the end of Sept, 2021. It was followed by an early drop of leaves. Would fertilizing the tree help or do we need to spray with a fungicide? And if spraying is recommended, what is the safest product to use? Answer: Abi Griffith, Horticulture read more